I have a
corrector for my refractor that works well at 119mm from sensor. I have a Baader FFC that I'd like to use in the imaging train. The FFC magnification is proportional to the spacing between the glass and the CCD. Do I:
1_ place the FFC at the native focal point of the refactor then have the corrector then the CCD at 119mm?
or
2_ place the corrector up the tube 119mm ahead of the FFC glass and then the CCD can be spaced as usual to get the required magnification.
In #1 I can't get magnification smaller than x4. With #2 I'd still be able to go down to x3.
TIA.
